Suppress agent popup notification when status is already visible (#49044)

If you have Zed open and the sidebar open, don't show a notification
when a thread finishes.

Closes AI-18

(No release notes because multi-agent is still feature-flagged.)

Release Notes:

- N/A

crates/agent_ui/src/acp/thread_view.rs

@@ -2151,30 +2151,40 @@ impl AcpServerView {
         self.show_notification(caption, icon, window, cx);
     }
 
-    fn agent_is_visible(&self, window: &Window, cx: &App) -> bool {
-        if window.is_window_active() {
-            let workspace_is_foreground = window
-                .root::<MultiWorkspace>()
-                .flatten()
-                .and_then(|mw| {
-                    let mw = mw.read(cx);
-                    self.workspace.upgrade().map(|ws| mw.workspace() == &ws)
-                })
-                .unwrap_or(true);
+    fn agent_panel_visible(&self, multi_workspace: &Entity<MultiWorkspace>, cx: &App) -> bool {
+        let Some(workspace) = self.workspace.upgrade() else {
+            return false;
+        };
 
-            if workspace_is_foreground {
-                if let Some(workspace) = self.workspace.upgrade() {
-                    return AgentPanel::is_visible(&workspace, cx);
-                }
-            }
+        multi_workspace.read(cx).workspace() == &workspace && AgentPanel::is_visible(&workspace, cx)
+    }
+
+    fn agent_status_visible(&self, window: &Window, cx: &App) -> bool {
+        if !window.is_window_active() {
+            return false;
         }
 
-        false
+        if let Some(multi_workspace) = window.root::<MultiWorkspace>().flatten() {
+            multi_workspace.read(cx).is_sidebar_open()
+                || self.agent_panel_visible(&multi_workspace, cx)
+        } else {
+            self.workspace
+                .upgrade()
+                .is_some_and(|workspace| AgentPanel::is_visible(&workspace, cx))
+        }
     }
 
     fn play_notification_sound(&self, window: &Window, cx: &mut App) {
         let settings = AgentSettings::get_global(cx);
-        if settings.play_sound_when_agent_done && !self.agent_is_visible(window, cx) {
+        let visible = window.is_window_active()
+            && if let Some(mw) = window.root::<MultiWorkspace>().flatten() {
+                self.agent_panel_visible(&mw, cx)
+            } else {
+                self.workspace
+                    .upgrade()
+                    .is_some_and(|workspace| AgentPanel::is_visible(&workspace, cx))
+            };
+        if settings.play_sound_when_agent_done && !visible {
             Audio::play_sound(Sound::AgentDone, cx);
         }
     }
@@ -2192,7 +2202,7 @@ impl AcpServerView {
 
         let settings = AgentSettings::get_global(cx);
 
-        let should_notify = !self.agent_is_visible(window, cx);
+        let should_notify = !self.agent_status_visible(window, cx);
 
         if !should_notify {
             return;
@@ -2296,7 +2306,7 @@ impl AcpServerView {
                     let pop_up_weak = pop_up.downgrade();
 
                     cx.observe_window_activation(window, move |this, window, cx| {
-                        if this.agent_is_visible(window, cx)
+                        if this.agent_status_visible(window, cx)
                             && let Some(pop_up) = pop_up_weak.upgrade()
                         {
                             pop_up.update(cx, |notification, cx| {